I wanted to congratulate @narrobb on his work. I've been playing with the iPendant and it works as advertised. Install was dead simple. And with a few edits to the install files, I was able to get it running on the beta version of V2.0.2 that's on my mill. The custom buttons are easy to set up and are very handy. I was able to stop a running program with no noticeable latency. Good job!